GB 50196-1993 Design specification for high-multiple and medium-multiple foam fire extinguishing systems
Some standard content:
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
50196—93
Code for design of high & medium expansion foam systemsConstruction Standard
1993—12-30
1994—08-01
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
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Jointly Issued
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National Standard of the People's Republic of China
Code for design of high & medium expansion foam systems systemsGB
5019693
Editor department: Ministry of Public Security of the People's Republic of ChinaApproval department: Ministry of Construction of the People's Republic of ChinaEffective date: August 1, 1994
Engineering construction standard full text information system
Engineering construction standard full text information system
Notice on the release of the national standard "Design specification for high-multiple and medium-multiple foam fire-fighting systems"
Jianbiao [1994] No. 23
According to the requirements of the State Planning Commission's document [1989] No. 30, the Tianjin Fire Science Research Institute of the Ministry of Public Security is responsible for the chief editor and jointly compiled with relevant units. The national standard "Design specification for high-multiple and medium-multiple foam fire-fighting systems" has been reviewed by relevant departments. The "Design specification for high-multiple and medium-multiple foam fire-fighting systems" GB50196-93 is now approved as a mandatory national standard and will be implemented on August 1, 1994. This specification is managed by the Ministry of Public Security, and its specific interpretation and other work is the responsibility of the Tianjin Fire Science Research Institute of the Ministry of Public Security, and its publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
December 30, 1993
Engineering Construction Standards Full Text Information System
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Terms and symbols
Basic provisions
System type selection...
Foam liquid selection, storage and foam mixture preparation System components
High-multiplicity foam fire extinguishing system
General provisions
System design
System components
Detection , Alarm and Control
Medium Multiple Foam Fire Extinguishing System·
System Design
System Components
Appendix A
Terms Used in This Code
Additional Notes
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(16)
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1 General Provisions
1.0.1 This code is formulated to reasonably design high multiple and medium multiple foam fire extinguishing systems, reduce fire hazards, and protect the safety of people and property. 1.0.2 The design of high multiple and medium multiple foam fire extinguishing systems should comply with the relevant national policies and guidelines, and be safe, reliable, technologically advanced, and economically reasonable based on the actual conditions of the protection area.
This code is applicable to the design of high multiple and medium multiple foam fire extinguishing systems installed in new, rebuilt or expanded projects.
1.0.4 High-multiplier and medium-multiplier foam fire extinguishing systems can be used to extinguish the following fires: 1.0.4.1 Class B fires of gasoline, kerosene, diesel, industrial benzene, etc. 1.0.4.2
Class A fires of wood, paper, rubber, textiles, etc. 3 Fires in closed places with live electrical equipment.
Control the flow of liquefied oil and gas and liquefied natural gas. 1.0.5 High-multiplier and medium-multiplier foam fire extinguishing systems shall not be used to extinguish fires containing the following substances:
1.0.5.1 Chemical substances and strong oxidants that can still be rapidly oxidized in an airless environment, such as nitrocellulose and explosives.
1.0.5.2 Active metals and chemicals such as potassium, sodium, magnesium, titanium and phosphorus pentoxide.
Unclosed live electrical equipment.
1.0.6 In addition to the provisions of this code, the design of high-expansion and medium-expansion foam fire extinguishing systems shall also comply with the provisions of the relevant current national standards and specifications. Engineering Construction Standards Full-text Information System
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Terms and Symbols
2.1 Terms
2.1.1 Expansion
The ratio of the volume of foam to the volume of the foam mixture that produces these foams. 2.1.2 High-expansion foam Foam with an expansion ratio of 201 to 1000.
2.1.3 Medium-expansion foam Foam with an expansion ratio of 21 to 200.
2.1.4 Concentration
The volume percentage of foam liquid in the foam mixture. 2.1.5 Foam supply rate rate of foam application Total volume of foam supplied per minute.
2.1.6 Enclosure
Space enclosed by a flame-retardant or non-combustible body. 2.1.7 Foam transit tube
A tube that delivers high-expansion foam from the foam generator outlet to the protected area. 2.1.8 Total flooding of high expansion foam extinguishing system A fire extinguishing system that uses a fixed high-expansion foam generating device to spray high-expansion foam into a closed or fenced protected area and reaches a certain foam flooding depth within a specified time.
2.1.9 Local application of high and medium expansion foam extinguishing system A fire extinguishing system that uses a fixed or semi-fixed high or medium expansion foam generating device to spray foam directly or through a foam transit tube to the fire site. Engineering 2 Construction Standard Full Text Information System
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Mobile high-expansion and medium-expansion foam fire-extinguishing systemmedium expansion foam extinguishing systemmobileof high
A fire-extinguishing system that sprays foam to the fire site directly or through a bubble guide tube by a mobile high-expansion and medium-expansion foam generating device. 2.2 Symbols
Flooded volume
Ground area of the protection zone
Foam submersion depth
Volume occupied by fixed machinery and equipment and other non-combustible objectsMinimum foam supply rate
Flooded time
Foam burst compensation coefficient
Foam leakage compensation coefficient
Foam breaking rate
Ratio of foam breaking rate to water sprinkler discharge rateMaximum number of water sprinklers expected to be in operationTotal flowCalculated number of foam generators set in the protection zoneFoaming volume of each foam generator at the set average inlet pressure
Foam mixture flow rate in the protection zone
Foam mixture flow rate of each foam generator at the set average inlet pressure
Foam liquid flow rate for foaming in the protection zone
Mixing ratio
Water flow rate for foaming in the protection zone
Foam increase rate
Oil tank Minimum reserve of foam liquid
Supply intensity of foam mixture
Oil tank protection area
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Minimum foam spraying time
Minimum reserve of foam liquid for the system
Continued table of foam liquid reserve for the largest oil tank
Amount of foam liquid in the pipeline between the foam liquid storage tank and the foam generator of the farthest oil tank
Minimum reserve of water for the system
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Basic provisions
System type selection
3.1.1 The selection of system type should be determined based on the overall layout of the protection area, the degree of fire hazard, the type of fire and the conditions for fire fighting, and after comprehensive technical and economic comparison. 3.1.2 High-multiplier foam fire extinguishing systems can be divided into full-flooding high-multiplier foam fire extinguishing systems, local application high-multiplier foam fire extinguishing systems and mobile high-multiplier foam fire extinguishing systems; medium-multiplier foam fire extinguishing systems can be divided into local application medium-multiplier foam fire extinguishing systems and mobile medium-multiplier foam fire extinguishing systems. 3.1.3 The following places can choose full-flooding high-multiplier foam fire extinguishing systems: 3.1.3.1 Large-scale enclosed spaces.
Large-scale places with fixed walls or other enclosures to prevent foam loss. 3.1.3.2
Facilities.
3.1.4 The following places can choose local application high-multiplier foam fire extinguishing systems: 3.1.4.1 Local enclosed spaces within a large area. 3.1.4.2
Local places within a large area with enclosure facilities to prevent foam loss.
5 The following places can choose mobile high-multiplicity foam fire extinguishing system: 3.1.5
Fire scene where the location of the fire is difficult to determine or difficult for personnel to approach 3.1.5.2
Class B fire place with large flow.
Enclosed space where smoke exhaust, cooling or harmful gas removal is required in case of fire 3.1.5.3
3.1.6 The following places can choose local application type medium-multiplicity foam fire extinguishing system: 3.1.6.1 Local enclosed space within a large range. Engineering Construction Standard Full Text Information System
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3.1.6.2 Local places within a large range with enclosure facilities to prevent foam loss.
3.1.6.3 Class B fire place with large flow.
3.1.6.4 Class B fire place with an area of no more than 100m2 and large flow. 3.1.7 The following places can choose mobile medium-multiple foam fire extinguishing system: 3.1.7.1
Small fire places where the location of the fire is difficult to determine or where personnel are difficult to approach.
Dispersed Class B fire places.
3.1.7.3 Class B fire places with a flow of no more than 100m2. 3.2
Selection, storage and preparation of foam mixture 3.2.1 The selection of foam liquid for high-multiple foam fire extinguishing system shall comply with the following provisions: 3.2.1.1 When using fresh air for foaming, freshwater or seawater-resistant high-multiple foam liquid shall be selected according to the water source used by the system. 3.2.1.2 When using hot smoke for foaming, heat-resistant and smoke-resistant high-multiple foam liquid shall be used.
3.2.1.3 The system should use a foam liquid with a mixing ratio of 3%. 3.2.2 The selection of foam liquid for medium-multiple foam fire extinguishing system shall comply with the following provisions: 3.2.2.1 Freshwater or seawater-resistant high-multiple foam liquid shall be selected according to the water source used by the system, and medium-multiple foam liquid of freshwater and seawater general type may also be selected. 3.2.2.2 When selecting medium-multiple foam liquid, it is advisable to select foam liquid with a mixing ratio of 6%.
3.2.3 Foam liquid shall be sealed and stored in a dedicated storage tank; the storage tank shall be placed in a cool and dry place; the storage ambient temperature shall comply with the use temperature of the foam liquid. 3.2.4 Water containing oil and other substances that affect the generation and stability of foam shall not be used in the preparation of foam mixture.
3.2.5 The water temperature for preparing foam mixture should be 5~38℃. 3.2.6 Foam liquid must comply with the relevant provisions of the current national standard "High-multiple Foam Fire Extinguishing Agent".
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3.3 System Components
3.3.1 The coloring of system components should comply with the following provisions: 3.3.1.1 Foam generator, proportioning mixer, foam liquid storage tank, pressure switch, foam mixed liquid pipeline, foam liquid pipeline, pipeline filter should be painted red. 3.3.1.2 Water pump, foam liquid pump, water supply pipeline should be painted green. 3.3.2 When water storage equipment is selected, the effective volume of the water storage equipment should exceed 1.15 times the calculated water reserve of the fire extinguishing system, and a water level indicator should be installed. 3.3.3 Fixed normal pressure foam liquid storage tanks should be equipped with liquid level gauges, slag discharge holes, liquid outlet holes, sampling holes, air intake valves, manholes or hand holes, etc., and the name and model of the foam liquid should be marked. 3.3.4 Foam liquid storage tanks should be made of corrosion-resistant materials. When ordinary carbon steel plates are used, their inner surfaces should be treated with anti-corrosion. 3.3.5 When a foam generator is fixed in a protection zone, its foaming net should be made of corrosion-resistant metal materials.
3.3.6 A balanced pressure ratio mixer should be used for a fully flooded high-multiplicity foam fire extinguishing system or a local application high-multiplicity or medium-multiplicity foam fire extinguishing system in multiple protection zones with centralized control of different flow rates.
3.3.7 A pressure ratio mixer should be used for a fully flooded high-multiplicity foam fire extinguishing system or a local application high-multiplicity foam fire extinguishing system in a protection zone with a basically constant centralized control flow rate.
3.3.8 A negative pressure ratio mixer should be used for a local application high-multiplicity foam fire extinguishing system or a mobile high-multiplicity foam fire extinguishing system with a small flow rate. 3.3.9 For the local application type medium multiple foam fire extinguishing system in the protection area where the centralized control flow is basically constant, a ring pump type proportioning mixer should be used, and for the mobile type medium multiple foam fire extinguishing system, a negative pressure proportioning mixer should be used.
3.3.10 The working pressure of the system pipeline should not exceed 1.2MPa. 3.3.11 The flow rate of foam liquid, water and foam mixture in the main pipeline should not exceed 5m/s; the flow rate in the branch pipeline should not exceed 10m/s. 3.3.12 The parts in the foam generator or proportioning mixer that are in contact with the foam liquid or foam mixture should be made of corrosion-resistant materials.
3.3.13 A standby pump should be set for the fixed fire water pump and foam liquid pump or foam mixture pump. The foam liquid pump should be a corrosion-resistant pump. 3.3.14 Galvanized steel pipes may be used for dry pipes of high-multiple foam fire extinguishing systems; seamless steel pipes may be used for dry pipes of medium-multiple foam fire extinguishing systems, and both shall be equipped with pipe cleaning devices.
Wet pipes of high-multiple and medium-multiple foam fire extinguishing systems may be made of stainless steel pipes or carbon steel pipes with internal and external anti-corrosion treatments. In areas with freezing in cold seasons, anti-freezing facilities shall be adopted.
3.3.15 Control valves, pressure gauges and pipe filters shall be installed in front of the foam generator. 3.3.16 When the foam generator is used outdoors or in a tunnel, measures shall be taken to prevent the wind from affecting the generation and distribution of foam.
3.3.17 When the pipes in the protection area are connected by flanges, asbestos rubber gaskets shall be used as gaskets.
When a centralized fire pump room (station) is used, a foam mixture pump or water pump and foam liquid pump, foam liquid storage tank, proportioning mixer, control box, pipe filter, etc. should be installed in the pump room.
Equipped power should be installed in the fire pump room.
Communication equipment for external communication should be installed in the fire pump room. Drainage facilities should be installed in the protection area.
The operating valve on the pipeline should be located outside the protection area. Pressure gauges should be installed at both ends of the pipe filter before the proportioning mixer. Engineering Construction Standard Full Text Information System
W.bzsoso.coI3 Class B fire places with a flow of no more than 100m2. 3.2
Selection, storage and preparation of foam mixture 3.2.1 The selection of foam for high-multiple foam fire extinguishing system shall comply with the following provisions: 3.2.1.1 When fresh air is used for foaming, freshwater or seawater-resistant high-multiple foam shall be selected according to the water source used by the system. 3.2.1.2 When hot flue gas is used for foaming, heat-resistant and smoke-resistant high-multiple foam shall be used.
3.2.1.3 The system should use a foam with a mixing ratio of 3%. 3.2.2 The selection of foam for medium-multiple foam fire extinguishing system shall comply with the following provisions: 3.2.2.1 Freshwater or seawater-resistant high-multiple foam shall be selected according to the water source used by the system, and freshwater and seawater general medium-multiple foam can also be selected. 3.2.2.2 When medium-multiple foam is selected, a foam with a mixing ratio of 6% is preferred.
3.2.3 Foam liquid should be sealed and stored in a dedicated storage tank; the storage tank should be placed in a cool and dry place; the storage environment temperature should meet the use temperature of the foam liquid. 3.2.4 Water containing oil and other substances that affect the generation and stability of foam should not be used to prepare the foam mixture.
3.2.5 The water temperature for preparing the foam mixture should be 5~38℃. 3.2.6 Foam liquid must comply with the relevant provisions of the current national standard "High-multiplicity Foam Fire Extinguishing Agent".
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3.3 System Components
3.3.1 The color of system components should comply with the following provisions: 3.3.1.1 Foam generator, proportioning mixer, foam liquid storage tank, pressure switch, foam mixture pipeline, foam liquid pipeline, and pipeline filter should be painted red. 3.3.1.2 Water pumps, foam liquid pumps and water supply pipes should be painted green. 3.3.2 When water storage equipment is selected, the effective volume of the water storage equipment should exceed 1.15 times the calculated water reserve of the fire extinguishing system, and a water level indicator should be installed. 3.3.3 Fixed normal pressure foam liquid storage tanks should be equipped with liquid level gauges, slag discharge holes, liquid outlet holes, sampling holes, air suction valves and manholes or hand holes, etc., and the name and model of the foam liquid should be marked. 3.3.4 Foam liquid storage tanks should be made of corrosion-resistant materials. When ordinary carbon steel plates are used, their inner surfaces should be treated with anti-corrosion. 3.3.5 When a foam generator is fixed in the protection area, its foaming net should be made of corrosion-resistant metal materials.
3.3.6 A balanced pressure ratio mixer should be used for the fully flooded high-multiplier foam fire extinguishing system or the local application high-multiplier and medium-multiplier foam fire extinguishing system for multiple protection areas with centralized control of different flow rates.
3.3.7 The full flooding high-multiplicity foam fire extinguishing system or local application high-multiplicity foam fire extinguishing system in the protection area where the centralized control flow rate is basically unchanged should adopt a pressure ratio mixer.
3.3.8 The local application high-multiplicity foam fire extinguishing system or mobile high-multiplicity foam fire extinguishing system with a small flow rate should adopt a negative pressure ratio mixer. 3.3.9 The local application medium-multiplicity foam fire extinguishing system in the protection area where the centralized control flow rate is basically unchanged should adopt a ring pump ratio mixer, and the mobile medium-multiplicity foam fire extinguishing system should adopt a negative pressure ratio mixer.
3.3.10 The working pressure of the system pipeline should not exceed 1.2MPa. 3.3.11 The flow rate of foam liquid, water and foam mixture in the main pipeline should not exceed 5m/s; the flow rate in the branch pipeline should not exceed 10m/s. 3.3.12 The parts of the foam generator or proportioning mixer that are in contact with the foam liquid or foam mixture shall be made of corrosion-resistant materials.
3.3.13 A standby pump shall be provided for the fixed fire water pump and the foam liquid pump or the foam mixture pump. The foam liquid pump shall be corrosion-resistant. 3.3.14 The dry pipe of the high-multiplicity foam fire extinguishing system may be galvanized steel pipe; the dry pipe of the medium-multiplicity foam fire extinguishing system may be seamless steel pipe, and both shall be equipped with a device for cleaning the pipe.
The wet pipe of the high-multiplicity and medium-multiplicity foam fire extinguishing system may be stainless steel pipe or carbon steel pipe with anti-corrosion treatment inside and outside. In areas with freezing in cold seasons, anti-freezing facilities shall be taken.
3.3.15 A control valve, pressure gauge and pipe filter shall be installed before the foam generator. 3.3.16 When the foam generator is used outdoors or in a tunnel, measures should be taken to prevent the wind from affecting the generation and distribution of foam.
3.3.17 When the pipelines in the protection zone are connected by flanges, asbestos rubber gaskets should be used as gaskets.
When a centrally controlled fire pump room (station) is used, a foam mixture pump or water pump and foam liquid pump, foam liquid storage tank, proportioning mixer, control box, pipeline filter, etc. should be installed in the pump room.
Equipped power should be installed in the fire pump room.
Communication equipment for external communication should be installed in the fire pump room. Drainage facilities should be installed in the protection zone.
The operating valve on the pipeline should be located outside the protection zone. Pressure gauges should be installed at both ends of the pipeline filter before the proportioning mixer. Engineering Construction Standard Full Text Information System
W.bzsoso.coI3 Class B fire places with a flow of no more than 100m2. 3.2
Selection, storage and preparation of foam mixture 3.2.1 The selection of foam for high-multiple foam fire extinguishing system shall comply with the following provisions: 3.2.1.1 When fresh air is used for foaming, freshwater or seawater-resistant high-multiple foam shall be selected according to the water source used by the system. 3.2.1.2 When hot flue gas is used for foaming, heat-resistant and smoke-resistant high-multiple foam shall be used.
3.2.1.3 The system should use a foam with a mixing ratio of 3%. 3.2.2 The selection of foam for medium-multiple foam fire extinguishing system shall comply with the following provisions: 3.2.2.1 Freshwater or seawater-resistant high-multiple foam shall be selected according to the water source used by the system, and freshwater and seawater general medium-multiple foam can also be selected. 3.2.2.2 When medium-multiple foam is selected, a foam with a mixing ratio of 6% is preferred.
3.2.3 Foam liquid should be sealed and stored in a dedicated storage tank; the storage tank should be placed in a cool and dry place; the storage environment temperature should meet the use temperature of the foam liquid. 3.2.4 Water containing oil and other substances that affect the generation and stability of foam should not be used to prepare the foam mixture.
3.2.5 The water temperature for preparing the foam mixture should be 5~38℃. 3.2.6 Foam liquid must comply with the relevant provisions of the current national standard "High-multiplicity Foam Fire Extinguishing Agent".
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3.3 System Components
3.3.1 The color of system components should comply with the following provisions: 3.3.1.1 Foam generator, proportioning mixer, foam liquid storage tank, pressure switch, foam mixture pipeline, foam liquid pipeline, and pipeline filter should be painted red. 3.3.1.2 Water pumps, foam liquid pumps and water supply pipes should be painted green. 3.3.2 When water storage equipment is selected, the effective volume of the water storage equipment should exceed 1.15 times the calculated water reserve of the fire extinguishing system, and a water level indicator should be installed. 3.3.3 Fixed normal pressure foam liquid storage tanks should be equipped with liquid level gauges, slag discharge holes, liquid outlet holes, sampling holes, air suction valves and manholes or hand holes, etc., and the name and model of the foam liquid should be marked. 3.3.4 Foam liquid storage tanks should be made of corrosion-resistant materials. When ordinary carbon steel plates are used, their inner surfaces should be treated with anti-corrosion. 3.3.5 When a foam generator is fixed in the protection area, its foaming net should be made of corrosion-resistant metal materials.
3.3.6 A balanced pressure ratio mixer should be used for the fully flooded high-multiplier foam fire extinguishing system or the local application high-multiplier and medium-multiplier foam fire extinguishing system for multiple protection areas with centralized control of different flow rates.
3.3.7 The full flooding high-multiplicity foam fire extinguishing system or local application high-multiplicity foam fire extinguishing system in the protection area where the centralized control flow rate is basically unchanged should adopt a pressure ratio mixer.
3.3.8 The local application high-multiplicity foam fire extinguishing system or mobile high-multiplicity foam fire extinguishing system with a small flow rate should adopt a negative pressure ratio mixer. 3.3.9 The local application medium-multiplicity foam fire extinguishing system in the protection area where the centralized control flow rate is basically unchanged should adopt a ring pump ratio mixer, and the mobile medium-multiplicity foam fire extinguishing system should adopt a negative pressure ratio mixer.
3.3.10 The working pressure of the system pipeline should not exceed 1.2MPa. 3.3.11 The flow rate of foam liquid, water and foam mixture in the main pipeline should not exceed 5m/s; the flow rate in the branch pipeline should not exceed 10m/s. 3.3.12 The parts of the foam generator or proportioning mixer that are in contact with the foam liquid or foam mixture shall be made of corrosion-resistant materials.
3.3.13 A standby pump shall be provided for the fixed fire water pump and the foam liquid pump or the foam mixture pump. The foam liquid pump shall be corrosion-resistant. 3.3.14 The dry pipe of the high-multiplicity foam fire extinguishing system may be galvanized steel pipe; the dry pipe of the medium-multiplicity foam fire extinguishing system may be seamless steel pipe, and both shall be equipped with a device for cleaning the pipe.
The wet pipe of the high-multiplicity and medium-multiplicity foam fire extinguishing system may be stainless steel pipe or carbon steel pipe with anti-corrosion treatment inside and outside. In areas with freezing in cold seasons, anti-freezing facilities shall be taken.
3.3.15 A control valve, pressure gauge and pipe filter shall be installed before the foam generator. 3.3.16 When the foam generator is used outdoors or in a tunnel, measures should be taken to prevent the wind from affecting the generation and distribution of foam.
3.3.17 When the pipelines in the protection zone are connected by flanges, asbestos rubber gaskets should be used as gaskets.
When a centrally controlled fire pump room (station) is used, a foam mixture pump or water pump and foam liquid pump, foam liquid storage tank, proportioning mixer, control box, pipeline filter, etc. should be installed in the pump room.
Equipped power should be installed in the fire pump room.
Communication equipment for external communication should be installed in the fire pump room. Drainage facilities should be installed in the protection zone.
The operating valve on the pipeline should be located outside the protection zone. Pressure gauges should be installed at both ends of the pipeline filter before the proportioning mixer. Engineering Construction Standard Full Text Information System
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The components of the fire extinguisher should be made of corrosion-resistant materials.
3.3.13 Standby pumps should be set for fixed fire water pumps and foam liquid pumps or foam mixed liquid pumps. Foam liquid pumps should be corrosion-resistant pumps. 3.3.14 Galvanized steel pipes can be used for dry pipes of high-multiple foam fire extinguishing systems; seamless steel pipes can be used for dry pipes of medium-multiple foam fire extinguishing systems, and both should be equipped with pipe cleaning devices.
Wet pipes of high-multiple and medium-multiple foam fire extinguishing systems can be made of stainless steel pipes or carbon steel pipes with internal and external anti-corrosion treatment. In areas with freezing in cold seasons, anti-freezing facilities should be taken.
3.3.15 Control valves, pressure gauges and pipe filters should be installed in front of the foam generator. 3.3.16 When the foam generator is used outdoors or in a tunnel, measures should be taken to prevent the wind from affecting the generation and distribution of foam.
3.3.17 When the pipelines in the protection zone are connected by flanges, asbestos rubber gaskets should be used as gaskets.
When a centralized control fire pump room (station) is used, a foam mixture pump or water pump and foam liquid pump, foam liquid storage tank, proportioning mixer, control box, pipeline filter, etc. should be installed in the pump room.
Equipped power should be installed in the fire pump room.
Communication equipment for external communication should be installed in the fire pump room. Drainage facilities should be installed in the protection zone.
The operating valve on the pipeline should be located outside the protection zone. Pressure gauges should be installed at both ends of the pipeline filter before the proportioning mixer. Engineering Construction Standard Full Text Information SystemwwW.bzxz.Net
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The components of the fire extinguisher should be made of corrosion-resistant materials.
3.3.13 Standby pumps should be set for fixed fire water pumps and foam liquid pumps or foam mixed liquid pumps. Foam liquid pumps should be corrosion-resistant pumps. 3.3.14 Galvanized steel pipes can be used for dry pipes of high-multiple foam fire extinguishing systems; seamless steel pipes can be used for dry pipes of medium-multiple foam fire extinguishing systems, and both should be equipped with pipe cleaning devices.
Wet pipes of high-multiple and medium-multiple foam fire extinguishing systems can be made of stainless steel pipes or carbon steel pipes with internal and external anti-corrosion treatment. In areas with freezing in cold seasons, anti-freezing facilities should be taken.
3.3.15 Control valves, pressure gauges and pipe filters should be installed in front of the foam generator. 3.3.16 When the foam generator is used outdoors or in a tunnel, measures should be taken to prevent the wind from affecting the generation and distribution of foam.
3.3.17 When the pipelines in the protection zone are connected by flanges, asbestos rubber gaskets should be used as gaskets.
When a centralized control fire pump room (station) is used, a foam mixture pump or water pump and foam liquid pump, foam liquid storage tank, proportioning mixer, control box, pipeline filter, etc. should be installed in the pump room.
Equipped power should be installed in the fire pump room.
Communication equipment for external communication should be installed in the fire pump room. Drainage facilities should be installed in the protection zone.
The operating valve on the pipeline should be located outside the protection zone. Pressure gauges should be installed at both ends of the pipeline filter before the proportioning mixer. Engineering Construction Standard Full Text Information System
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